Selected verses from the Dhātuvibhaṅga Sutta (Majjhima Nikāya 140) of Theravada Buddhism.

“He understands thus: ‘If I were to direct this equanimity, so purified and bright, to the base of infinite space and to develop my mind accordingly, then this equanimity of mine, supported by that base, clinging to it, would remain for a very long time. If I were to direct this equanimity, so purified and bright, to the base of infinite consciousness… …to the base of nothingness…to the base of neither-perception-nor-non-perception and to develop my mind accordingly, then this equanimity of mine, supported by that base, clinging to it, would remain for a very long time.’

“He understands thus: ‘If I were to direct this equanimity, so purified and bright, to the base of infinite space and to develop my mind accordingly, this would be conditioned. If I were to direct this equanimity, so purified and bright, to the base of infinite consciousness…to the base of nothingness…to the base of neither-perception-nor-non-perception and to develop my mind accordingly, this would be conditioned.’

He does not form any condition or generate any volition tending towards either being or non-being. Since he does not form any condition or generate any volition tending towards either being or non-being, he does not cling to anything in this world. When he does not cling, he is not agitated. When he is not agitated, he personally attains Nibbāna. He understands thus: ‘Birth is destroyed, the holy life has been lived, what had to be done has been done, there is no more coming to any state of being.’ ......

“Formerly, when he was ignorant, he experienced covetousness, desire, and lust; now he has abandoned them, cut them off at the root, made them like a palm stump, done away with them so that they are no longer subject to future arising. Formerly, when he was ignorant, he experienced anger, ill will, and hate; now he has abandoned them, cut them off at the root, made them like a palm stump, done away with them so that they are no longer subject to future arising. Formerly, when he was ignorant, he experienced ignorance and delusion; now he has abandoned them, cut them off at the root, made them like a palm stump, done away with them so that they are no longer subject to future arising. Therefore a bhikkhu possessing this peace possesses the supreme foundation of peace. For this, bhikkhu, is the supreme noble peace, namely, the pacification of lust, hate, and delusion.

“So it was with reference to this that it was said: ‘One should not neglect wisdom, should preserve truth, should cultivate relinquishment, and should train for peace.’

“‘The tides of conceiving do not sweep over one who stands upon these foundations, and when the tides of conceiving no longer sweep over him he is called a sage at peace.’ So it was said.

“Bhikkhu, ‘I am’ is a conceiving; ‘I am this’ is a conceiving; ‘I shall be’ is a conceiving; ‘I shall not be’ is a conceiving; ‘I shall be possessed of form’ is a conceiving; ‘I shall be formless’ is a conceiving; ‘I shall be percipient’ is a conceiving; ‘I shall be non-percipient’ is a conceiving; ‘I shall be neither-percipient-nor-non-percipient’ is a conceiving. Conceiving is a disease, conceiving is a tumor, conceiving is a dart. By overcoming all conceivings, bhikkhu, one is called a sage at peace. And the sage at peace is not born, does not age, does not die; he is not shaken and does not yearn. For there is nothing present in him by which he might be born. Not being born, how could he age? Not aging, how could he die? Not dying, how could he be shaken? Not being shaken, why should he yearn?

“So it was with reference to this that it was said: ‘The tides of conceiving do not sweep over one who stands upon these foundations, and when the tides of conceiving no longer sweep over him he is called a sage at peace.’ 

READ MORE: https://suttacentral.net/mn140/?view=normal&lang=en